The "snowball clause" is one way that editors are encouraged to exercise common sense and avoid pointy, bureaucratic behavior. The snowball clause states:
|“||If an issue does not have a snowball's chance in hell of being accepted by a certain process, there's no need to run it through the entire process.||”|
The snowball clause is designed to prevent editors from getting tangled up in long, mind-numbing, bureaucratic discussions over things that are foregone conclusions from the start.
The snowball clause is not policy, and there are sometimes good reasons for pushing ahead against the flames anyway; well-aimed snowballs have, on rare occasions, made it through the inferno to reach their marks. The clause should be seen as a polite request not to waste everyone's time.